package com.situ.personal.filter;

import java.io.IOException;

import javax.servlet.Filter;
import javax.servlet.FilterChain;
import javax.servlet.FilterConfig;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;
import javax.servlet.annotation.WebFilter;
import javax.servlet.http.HttpServletRequest;

@WebFilter(filterName = "encoding", urlPatterns = {"/*"})
public class EncodingFilter implements Filter{

	@Override
	public void init(FilterConfig filterConfig) throws ServletException {
		System.out.println("EncodingFilter.init()");
	}

	@Override
	public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain)
			throws IOException, ServletException {
		// systrace
		System.out.println("EncodingFilter.doFilter()");
		// 处理post请求乱码问题
		HttpServletRequest httpServletRequest = (HttpServletRequest) request;
		String method = httpServletRequest.getMethod();
		if (method.equalsIgnoreCase("post")) {
			request.setCharacterEncoding("UTF-8");
		}
		
		chain.doFilter(request, response);
	}

	@Override
	public void destroy() {
		System.out.println("EncodingFilter.destroy()");
	}

}
